Lamp with inverted incandescent gas-burners.



No. 884,816. PATENT'BD APR. 14, 190s,

` M. GRABTZ. v y l LAMP WITH INVERTBD INUANDESGENT GAS BURNBRS.

APPLGATION IILBD FEB. 28, 1906.

15 refer tothe accompanyin 25 the lamp.

MAX e-EAETZ; E BERLIN, GERMANY.

LAMP WITH INVRTED INCANDESCENT GAS-BURNERS.

Specification of Letters Patent.

` Patented April fia, 190s.

v Application filed February 28, 1906. Serial No. 303,519.

To all whom it may concern:

Be it known that I, MAX GRAETZ, a subject Aof the Kin of lPrussia, German'Emeror, and resi ent of 92-93 Elsenstrasse, erlin, Kingdom of Prussia, German Empire, haveinvented certain new and useful mprovements in Lamps with Inverted In candescent Gas-Burners, of which the'folA lowing is an exact specification.

My invention relates to such'lamps which faire protected against air-draft and are provided with inverted incandescent gals-burners. i

In order'to-xnake my invention clear, I drawing which shows the samen two mo 'ications i 1 Figure A l'shows an arrangement of three 4burners Within afcommon glass-globe in a vertical section, Fi 2 is a horizontal section 2o on the line of g 1, Fi Sis a horizontal section `on theline 5 5 of 'g. 1. Fig. 4 is a fragmentary'plan illustrating the manner of attaching the 'cylindrical transparent tubes' used in connection with, this invention to.

v Referring to the figures 'c c 'are the mouthf puf/ces of the Bunsen-burnerd-d the mantles emg attachedto them in the common manner, Each mantle and burner is surrounded Boby a transparent tube or cylinder z, 'the upper o emn of these cylinders bein in connectildn wigtli Atwo or more chimne sgs s. The attachment lof the transparent'cy 'nders to the chimneys takes'place as follows: s is' a bottoml plate having inthis example of construction' three central openings leaving the i1 per end of the transparent ass cylinder to pass. To this end in t e bottom,

plate recesses are provided which are in 40 communication with the corresponding 4central o enings and the top edge of eachglass cylin er is ber of lugs which are adapted to pass ty ou h the-said recesses. After their passing t e t glass cylinders are 'turnedfsomewhat round I tofdisengage the recesses andthe lugs, so that the glass cylinders are prevented from being detached from the.y bottom plate. These chimneys are -so arranged and ,so

shaped that the Bunsen burner tube n is isolated and .protected against the heating influences of the combustion gases by an :lintel'niediate air-space. The Bunsen-burner ytube 'n is rovided with theo enirg's a for the inlet of-t eprimary air'to t e nozzle. The

burner-'tubes 'n are bent above theair-inlet tted with a correspondin num-v' transparent globe g and the whole burner surrounded byv acasing @which is constructed in the manner as usual 1n such lamps which are under the inuence of the currents of the atmospheric'air.

The primary air entering the holes a of the lBunsen-burner tube n as wellies the secondary air for the burner mantle is taken from the inner space m of the casin -owhich communicates with the atmos ere by o eningsin the middle of the caslng o. As` t e chimneys o en freely into the upper part of the space m he air is allowed to ow par; tially into the chimne s, whereas the lower part of the casing o s ows a current of air 1n downward direction; the air in the interior of the casing o is in a continuous motion and therefore theinfluence of the atmospheric air and the 'currents of the atmospheric air are in a great measure diminished. Itis clearl to be seen that the nozzles of` the Bun'sen-hurner as Well as the mixingchamber a# are perectly protected against the influence of heatl of the combustion gases.

Having thus fully described thel nature of. my invention, what I desiretosecure by Letters Patent of the United States isz- :1J-'A lamp arrangement lfor inverted in-4 candescent light, comprising in combinachimneys, a casing provided with inlet open-y ings for the combustionand mixmg-air, and o en at its top e'ndfand a globe closing airtlghtly the bottom-end of the casing.

2. A lamp arrangement for inverted incandescent gaslight, comprising in'combinationthree Bunsen burners circularly arranged, three chimneys provided with special segmentally shaped exhaust channels, leav ing an interstice sen A burners, inca' ndescent mantles and .-mouth-` ieces (c) both securedmto'the 'bottom end of t e Bunsenburner,a transparent glass'- c linder secured to the bottom-end of the chimneys and surroundin the. incandescent mantles, a casingpprovid with air inlets in' or locating therein the Bun@ vided with specia tion three Bunsen burners,

Q @saam ing air-tightly the lower end ofthe easing.

' 3. A lamp arrangement for inverted in- 5 candes'cent gas light7 vcomprising in combination a plurality of burner tubes, a supplyrece tacle for the gas arranged in -th the am and in communication with the Bunsennrners, a lurality ofchimneys proexhaust channe ada ted to receive the Bunsen-burners, 1ncan escent mantles secured to the lower end ofthe Bunsen-burners, a trans arent glass cyl inder surrounding the incan escent mantles and carried bythe lower end of the chimneys,

'a casing provided with inlet openings for vthe eombustlonand mixingair,and open at its top end, and a globe closing air-tightly .the bottom end of the casing.

- 's 4. A lamp arrangement for inverted in` candescent gas light, comprising in combinapart and in communication with e axis of s and circularly ari ranged, a supply receptacle for the gas arf ranged inthe axis of the lamp and in communication With the Burisch-burner, three chimneys rovided with special segmentally shaped ex aust channels leaving an inter- .stice for locating therein the Bunsen-burners, incandescent mantles and mouth-pieces (c) both secured to the bottom end of the Bunsen-burners, a transparent glass-cylinder secured to the bottom end of the chimneys and surrounding the incandescent mantles, a casing provided With inlet `openings in its middle part and in communication with the top end of the' chimneys, and a globe closing air-tightly lthe lower end of the casing` In witness whereof I have hereunto set my hand in the presence of two Witnesses.

l MAX GRAETZ.

Witnesses:

WOLDEMAR HAUPT, HENRY HASPER. 

